So just to be clear. Now that you are on hold, you received a score of 1-5 from 30 committee members and it is averaged out. That gives you a final score. That score will never change. You will have that score until the day the waitlist ends. It is simply them going down a list from highest to lowest score. Thats how acceptances are determined, how the waitlist is determined etc. So you can send an update-- but its not going to change your score. Your fate is already determined based on your interview, file review and vote form the comitteee. If you send an update they may put it in the notes section next to your score, and you check a box that you're still interested. But thats not going to change your score, it may lead to the breaking of a tie. I hope that makes sense, but truly your fate is already determined by your score and nothing will change that at this point.